ACPAtmospheric Chemistry and PhysicsACPAtmos. Chem. Phys.1680-7324Copernicus GmbHGöttingen, Germany10.5194/acp-11-53-2011Manchester Ice Nucleus Counter (MINC) measurements from the 2007 International workshop on Comparing Ice nucleation Measuring Systems (ICIS-2007)JonesH. M.1FlynnM. J.1DeMottP. J.2MöhlerO.31Centre for Atmospheric Science, SEAES, University of Manchester, Manchester, UK2Department of Atmospheric Science, Colorado State University, Fort Collins, Colorado, USA3Institute for Meteorology and Climate Research, Karlsruhe Institute of Technology, Germany030120111115365This work is licensed under a Creative Commons Attribution 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/3.0/This article is available from http://www.atmos-chem-phys.net/11/53/2011/acp-11-53-2011.htmlThe full text article is available as a PDF file from http://www.atmos-chem-phys.net/11/53/2011/acp-11-53-2011.pdf

An ice nucleus counter was developed and constructed to enable investigation
of potential ice nucleating materials. The Manchester Ice Nucleus Chamber
(MINC) is a concentric-cylinder continuous flow diffusion chamber (CFDC). A
full explanation of the MINC instrument is given here, along with first
results and a comparison to an established instrument of similar design
(Colorado State University CFDC) during sampling of common ice nucleating
aerosols at the 2007 International workshop on Comparing Ice nucleation
Measuring Systems (ICIS-2007). MINC and CSU-CFDC detected the onset of ice
nucleation under similar conditions of temperature and supersaturation for
several different types of ice nuclei. Comparisons of the ratio of ice
nuclei to total aerosol concentrations as a function of supersaturation with
respect to water (SS<sub>w</sub>) showed agreement within one order of magnitude.
Possible reasons for differences between the two instruments relating to
differences in their design are discussed, along with suggestions to future
improvements to the current design.